2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include "extent_io.h"
34 #include "extent_map.h"
35 #include "async-thread.h"
37 struct btrfs_trans_handle
;
38 struct btrfs_transaction
;
39 struct btrfs_pending_snapshot
;
40 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
41 extern struct kmem_cache
*btrfs_transaction_cachep
;
42 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
43 extern struct kmem_cache
*btrfs_path_cachep
;
44 extern struct kmem_cache
*btrfs_free_space_cachep
;
45 struct btrfs_ordered_sum
;
47 #define BTRFS_MAGIC "_BHRfS_M"
49 #define BTRFS_MAX_LEVEL 8
51 #define BTRFS_COMPAT_EXTENT_TREE_V0
54 * files bigger than this get some pre-flushing when they are added
55 * to the ordered operations list. That way we limit the total
56 * work done by the commit
58 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
60 /* holds pointers to all of the tree roots */
61 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
63 /* stores information about which extents are in use, and reference counts */
64 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
67 * chunk tree stores translations from logical -> physical block numbering
68 * the super block points to the chunk tree
70 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
73 * stores information about which areas of a given device are in use.
74 * one per device. The tree of tree roots points to the device tree
76 #define BTRFS_DEV_TREE_OBJECTID 4ULL
78 /* one per subvolume, storing files and directories */
79 #define BTRFS_FS_TREE_OBJECTID 5ULL
81 /* directory objectid inside the root tree */
82 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
84 /* holds checksums of all the data extents */
85 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
87 /* orhpan objectid for tracking unlinked/truncated files */
88 #define BTRFS_ORPHAN_OBJECTID -5ULL
90 /* does write ahead logging to speed up fsyncs */
91 #define BTRFS_TREE_LOG_OBJECTID -6ULL
92 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
94 /* for space balancing */
95 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
96 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
99 * extent checksums all have this objectid
100 * this allows them to share the logging tree
103 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
105 /* For storing free space cache */
106 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
109 * The inode number assigned to the special inode for sotring
112 #define BTRFS_FREE_INO_OBJECTID -12ULL
114 /* dummy objectid represents multiple objectids */
115 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
118 * All files have objectids in this range.
120 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
121 #define BTRFS_LAST_FREE_OBJECTID -256ULL
122 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
126 * the device items go into the chunk tree. The key is in the form
127 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
129 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
131 #define BTRFS_BTREE_INODE_OBJECTID 1
133 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
136 * we can actually store much bigger names, but lets not confuse the rest
139 #define BTRFS_NAME_LEN 255
141 /* 32 bytes in various csum fields */
142 #define BTRFS_CSUM_SIZE 32
145 #define BTRFS_CSUM_TYPE_CRC32 0
147 static int btrfs_csum_sizes
[] = { 4, 0 };
149 /* four bytes for CRC32 */
150 #define BTRFS_EMPTY_DIR_SIZE 0
152 #define BTRFS_FT_UNKNOWN 0
153 #define BTRFS_FT_REG_FILE 1
154 #define BTRFS_FT_DIR 2
155 #define BTRFS_FT_CHRDEV 3
156 #define BTRFS_FT_BLKDEV 4
157 #define BTRFS_FT_FIFO 5
158 #define BTRFS_FT_SOCK 6
159 #define BTRFS_FT_SYMLINK 7
160 #define BTRFS_FT_XATTR 8
161 #define BTRFS_FT_MAX 9
164 * The key defines the order in the tree, and so it also defines (optimal)
167 * objectid corresponds to the inode number.
169 * type tells us things about the object, and is a kind of stream selector.
170 * so for a given inode, keys with type of 1 might refer to the inode data,
171 * type of 2 may point to file data in the btree and type == 3 may point to
174 * offset is the starting byte offset for this key in the stream.
176 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
177 * in cpu native order. Otherwise they are identical and their sizes
178 * should be the same (ie both packed)
180 struct btrfs_disk_key
{
184 } __attribute__ ((__packed__
));
190 } __attribute__ ((__packed__
));
192 struct btrfs_mapping_tree
{
193 struct extent_map_tree map_tree
;
196 #define BTRFS_UUID_SIZE 16
197 struct btrfs_dev_item
{
198 /* the internal btrfs device id */
201 /* size of the device */
207 /* optimal io alignment for this device */
210 /* optimal io width for this device */
213 /* minimal io size for this device */
216 /* type and info about this device */
219 /* expected generation for this device */
223 * starting byte of this partition on the device,
224 * to allow for stripe alignment in the future
228 /* grouping information for allocation decisions */
231 /* seek speed 0-100 where 100 is fastest */
234 /* bandwidth 0-100 where 100 is fastest */
237 /* btrfs generated uuid for this device */
238 u8 uuid
[BTRFS_UUID_SIZE
];
240 /* uuid of FS who owns this device */
241 u8 fsid
[BTRFS_UUID_SIZE
];
242 } __attribute__ ((__packed__
));
244 struct btrfs_stripe
{
247 u8 dev_uuid
[BTRFS_UUID_SIZE
];
248 } __attribute__ ((__packed__
));
251 /* size of this chunk in bytes */
254 /* objectid of the root referencing this chunk */
260 /* optimal io alignment for this chunk */
263 /* optimal io width for this chunk */
266 /* minimal io size for this chunk */
269 /* 2^16 stripes is quite a lot, a second limit is the size of a single
274 /* sub stripes only matter for raid10 */
276 struct btrfs_stripe stripe
;
277 /* additional stripes go here */
278 } __attribute__ ((__packed__
));
280 #define BTRFS_FREE_SPACE_EXTENT 1
281 #define BTRFS_FREE_SPACE_BITMAP 2
283 struct btrfs_free_space_entry
{
287 } __attribute__ ((__packed__
));
289 struct btrfs_free_space_header
{
290 struct btrfs_disk_key location
;
294 } __attribute__ ((__packed__
));
296 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
298 BUG_ON(num_stripes
== 0);
299 return sizeof(struct btrfs_chunk
) +
300 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
303 #define BTRFS_FSID_SIZE 16
304 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
305 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
311 /* Errors detected */
312 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
314 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
315 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
317 #define BTRFS_BACKREF_REV_MAX 256
318 #define BTRFS_BACKREF_REV_SHIFT 56
319 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
320 BTRFS_BACKREF_REV_SHIFT)
322 #define BTRFS_OLD_BACKREF_REV 0
323 #define BTRFS_MIXED_BACKREF_REV 1
326 * every tree block (leaf or node) starts with this header.
328 struct btrfs_header
{
329 /* these first four must match the super block */
330 u8 csum
[BTRFS_CSUM_SIZE
];
331 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
332 __le64 bytenr
; /* which block this node is supposed to live in */
335 /* allowed to be different from the super from here on down */
336 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
341 } __attribute__ ((__packed__
));
343 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
344 sizeof(struct btrfs_header)) / \
345 sizeof(struct btrfs_key_ptr))
346 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
347 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
348 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
349 sizeof(struct btrfs_item) - \
350 sizeof(struct btrfs_file_extent_item))
351 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
352 sizeof(struct btrfs_item) -\
353 sizeof(struct btrfs_dir_item))
357 * this is a very generous portion of the super block, giving us
358 * room to translate 14 chunks with 3 stripes each.
360 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
361 #define BTRFS_LABEL_SIZE 256
364 * the super block basically lists the main trees of the FS
365 * it currently lacks any block count etc etc
367 struct btrfs_super_block
{
368 u8 csum
[BTRFS_CSUM_SIZE
];
369 /* the first 4 fields must match struct btrfs_header */
370 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
371 __le64 bytenr
; /* this block number */
374 /* allowed to be different from the btrfs_header from here own down */
381 /* this will help find the new super based on the log root */
382 __le64 log_root_transid
;
385 __le64 root_dir_objectid
;
391 __le32 sys_chunk_array_size
;
392 __le64 chunk_root_generation
;
394 __le64 compat_ro_flags
;
395 __le64 incompat_flags
;
400 struct btrfs_dev_item dev_item
;
402 char label
[BTRFS_LABEL_SIZE
];
404 __le64 cache_generation
;
406 /* future expansion */
408 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
409 } __attribute__ ((__packed__
));
412 * Compat flags that we support. If any incompat flags are set other than the
413 * ones specified below then we will fail to mount
415 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
416 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
417 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
418 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
420 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
421 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
422 #define BTRFS_FEATURE_INCOMPAT_SUPP \
423 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
424 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
425 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
426 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
429 * A leaf is full of items. offset and size tell us where to find
430 * the item in the leaf (relative to the start of the data area)
433 struct btrfs_disk_key key
;
436 } __attribute__ ((__packed__
));
439 * leaves have an item area and a data area:
440 * [item0, item1....itemN] [free space] [dataN...data1, data0]
442 * The data is separate from the items to get the keys closer together
446 struct btrfs_header header
;
447 struct btrfs_item items
[];
448 } __attribute__ ((__packed__
));
451 * all non-leaf blocks are nodes, they hold only keys and pointers to
454 struct btrfs_key_ptr
{
455 struct btrfs_disk_key key
;
458 } __attribute__ ((__packed__
));
461 struct btrfs_header header
;
462 struct btrfs_key_ptr ptrs
[];
463 } __attribute__ ((__packed__
));
466 * btrfs_paths remember the path taken from the root down to the leaf.
467 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
468 * to any other levels that are present.
470 * The slots array records the index of the item or block pointer
471 * used while walking the tree.
474 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
475 int slots
[BTRFS_MAX_LEVEL
];
476 /* if there is real range locking, this locks field will change */
477 int locks
[BTRFS_MAX_LEVEL
];
479 /* keep some upper locks as we walk down */
483 * set by btrfs_split_item, tells search_slot to keep all locks
484 * and to force calls to keep space in the nodes
486 unsigned int search_for_split
:1;
487 unsigned int keep_locks
:1;
488 unsigned int skip_locking
:1;
489 unsigned int leave_spinning
:1;
490 unsigned int search_commit_root
:1;
494 * items in the extent btree are used to record the objectid of the
495 * owner of the block and the number of references
498 struct btrfs_extent_item
{
502 } __attribute__ ((__packed__
));
504 struct btrfs_extent_item_v0
{
506 } __attribute__ ((__packed__
));
508 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
509 sizeof(struct btrfs_item))
511 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
512 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
514 /* following flags only apply to tree blocks */
516 /* use full backrefs for extent pointers in the block */
517 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
519 struct btrfs_tree_block_info
{
520 struct btrfs_disk_key key
;
522 } __attribute__ ((__packed__
));
524 struct btrfs_extent_data_ref
{
529 } __attribute__ ((__packed__
));
531 struct btrfs_shared_data_ref
{
533 } __attribute__ ((__packed__
));
535 struct btrfs_extent_inline_ref
{
538 } __attribute__ ((__packed__
));
540 /* old style backrefs item */
541 struct btrfs_extent_ref_v0
{
546 } __attribute__ ((__packed__
));
549 /* dev extents record free space on individual devices. The owner
550 * field points back to the chunk allocation mapping tree that allocated
551 * the extent. The chunk tree uuid field is a way to double check the owner
553 struct btrfs_dev_extent
{
555 __le64 chunk_objectid
;
558 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
559 } __attribute__ ((__packed__
));
561 struct btrfs_inode_ref
{
565 } __attribute__ ((__packed__
));
567 struct btrfs_timespec
{
570 } __attribute__ ((__packed__
));
572 enum btrfs_compression_type
{
573 BTRFS_COMPRESS_NONE
= 0,
574 BTRFS_COMPRESS_ZLIB
= 1,
575 BTRFS_COMPRESS_LZO
= 2,
576 BTRFS_COMPRESS_TYPES
= 2,
577 BTRFS_COMPRESS_LAST
= 3,
580 struct btrfs_inode_item
{
581 /* nfs style generation number */
583 /* transid that last touched this inode */
595 /* modification sequence number for NFS */
599 * a little future expansion, for more than this we can
600 * just grow the inode item and version it
603 struct btrfs_timespec atime
;
604 struct btrfs_timespec ctime
;
605 struct btrfs_timespec mtime
;
606 struct btrfs_timespec otime
;
607 } __attribute__ ((__packed__
));
609 struct btrfs_dir_log_item
{
611 } __attribute__ ((__packed__
));
613 struct btrfs_dir_item
{
614 struct btrfs_disk_key location
;
619 } __attribute__ ((__packed__
));
621 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
623 struct btrfs_root_item
{
624 struct btrfs_inode_item inode
;
630 __le64 last_snapshot
;
633 struct btrfs_disk_key drop_progress
;
636 } __attribute__ ((__packed__
));
639 * this is used for both forward and backward root refs
641 struct btrfs_root_ref
{
645 } __attribute__ ((__packed__
));
647 #define BTRFS_FILE_EXTENT_INLINE 0
648 #define BTRFS_FILE_EXTENT_REG 1
649 #define BTRFS_FILE_EXTENT_PREALLOC 2
651 struct btrfs_file_extent_item
{
653 * transaction id that created this extent
657 * max number of bytes to hold this extent in ram
658 * when we split a compressed extent we can't know how big
659 * each of the resulting pieces will be. So, this is
660 * an upper limit on the size of the extent in ram instead of
666 * 32 bits for the various ways we might encode the data,
667 * including compression and encryption. If any of these
668 * are set to something a given disk format doesn't understand
669 * it is treated like an incompat flag for reading and writing,
674 __le16 other_encoding
; /* spare for later use */
676 /* are we inline data or a real extent? */
680 * disk space consumed by the extent, checksum blocks are included
684 __le64 disk_num_bytes
;
686 * the logical offset in file blocks (no csums)
687 * this extent record is for. This allows a file extent to point
688 * into the middle of an existing extent on disk, sharing it
689 * between two snapshots (useful if some bytes in the middle of the
690 * extent have changed
694 * the logical number of file blocks (no csums included). This
695 * always reflects the size uncompressed and without encoding.
699 } __attribute__ ((__packed__
));
701 struct btrfs_csum_item
{
703 } __attribute__ ((__packed__
));
705 /* different types of block groups (and chunks) */
706 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
707 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
708 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
709 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
710 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
711 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
712 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
713 #define BTRFS_NR_RAID_TYPES 5
715 struct btrfs_block_group_item
{
717 __le64 chunk_objectid
;
719 } __attribute__ ((__packed__
));
721 struct btrfs_space_info
{
724 u64 total_bytes
; /* total bytes in the space,
725 this doesn't take mirrors into account */
726 u64 bytes_used
; /* total bytes used,
727 this doesn't take mirrors into account */
728 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
729 transaction finishes */
730 u64 bytes_reserved
; /* total bytes the allocator has reserved for
731 current allocations */
732 u64 bytes_readonly
; /* total bytes that are read only */
734 u64 bytes_may_use
; /* number of bytes that may be used for
735 delalloc/allocations */
736 u64 disk_used
; /* total bytes used on disk */
737 u64 disk_total
; /* total bytes on disk, takes mirrors into
741 * we bump reservation progress every time we decrement
742 * bytes_reserved. This way people waiting for reservations
743 * know something good has happened and they can check
744 * for progress. The number here isn't to be trusted, it
745 * just shows reclaim activity
747 unsigned long reservation_progress
;
749 int full
:1; /* indicates that we cannot allocate any more
750 chunks for this space */
751 int chunk_alloc
:1; /* set if we are allocating a chunk */
753 int force_alloc
; /* set if we need to force a chunk alloc for
756 struct list_head list
;
758 /* for block groups in our same type */
759 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
761 struct rw_semaphore groups_sem
;
762 atomic_t caching_threads
;
765 struct btrfs_block_rsv
{
769 struct btrfs_space_info
*space_info
;
770 struct list_head list
;
773 unsigned int priority
:8;
774 unsigned int durable
:1;
775 unsigned int refill_used
:1;
780 * free clusters are used to claim free space in relatively large chunks,
781 * allowing us to do less seeky writes. They are used for all metadata
782 * allocations and data allocations in ssd mode.
784 struct btrfs_free_cluster
{
786 spinlock_t refill_lock
;
789 /* largest extent in this cluster */
792 /* first extent starting offset */
795 struct btrfs_block_group_cache
*block_group
;
797 * when a cluster is allocated from a block group, we put the
798 * cluster onto a list in the block group so that it can
799 * be freed before the block group is freed.
801 struct list_head block_group_list
;
804 enum btrfs_caching_type
{
806 BTRFS_CACHE_STARTED
= 1,
807 BTRFS_CACHE_FINISHED
= 2,
810 enum btrfs_disk_cache_state
{
811 BTRFS_DC_WRITTEN
= 0,
815 BTRFS_DC_NEED_WRITE
= 4,
818 struct btrfs_caching_control
{
819 struct list_head list
;
821 wait_queue_head_t wait
;
822 struct btrfs_block_group_cache
*block_group
;
827 struct btrfs_block_group_cache
{
828 struct btrfs_key key
;
829 struct btrfs_block_group_item item
;
830 struct btrfs_fs_info
*fs_info
;
840 unsigned int dirty
:1;
843 int disk_cache_state
;
845 /* cache tracking stuff */
847 struct btrfs_caching_control
*caching_ctl
;
848 u64 last_byte_to_unpin
;
850 struct btrfs_space_info
*space_info
;
852 /* free space cache stuff */
853 struct btrfs_free_space_ctl
*free_space_ctl
;
855 /* block group cache stuff */
856 struct rb_node cache_node
;
858 /* for block groups in the same raid type */
859 struct list_head list
;
864 /* List of struct btrfs_free_clusters for this block group.
865 * Today it will only have one thing on it, but that may change
867 struct list_head cluster_list
;
870 struct reloc_control
;
872 struct btrfs_fs_devices
;
873 struct btrfs_fs_info
{
874 u8 fsid
[BTRFS_FSID_SIZE
];
875 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
876 struct btrfs_root
*extent_root
;
877 struct btrfs_root
*tree_root
;
878 struct btrfs_root
*chunk_root
;
879 struct btrfs_root
*dev_root
;
880 struct btrfs_root
*fs_root
;
881 struct btrfs_root
*csum_root
;
883 /* the log root tree is a directory of all the other log roots */
884 struct btrfs_root
*log_root_tree
;
886 spinlock_t fs_roots_radix_lock
;
887 struct radix_tree_root fs_roots_radix
;
889 /* block group cache stuff */
890 spinlock_t block_group_cache_lock
;
891 struct rb_root block_group_cache_tree
;
893 struct extent_io_tree freed_extents
[2];
894 struct extent_io_tree
*pinned_extents
;
896 /* logical->physical extent mapping */
897 struct btrfs_mapping_tree mapping_tree
;
899 /* block reservation for extent, checksum and root tree */
900 struct btrfs_block_rsv global_block_rsv
;
901 /* block reservation for delay allocation */
902 struct btrfs_block_rsv delalloc_block_rsv
;
903 /* block reservation for metadata operations */
904 struct btrfs_block_rsv trans_block_rsv
;
905 /* block reservation for chunk tree */
906 struct btrfs_block_rsv chunk_block_rsv
;
908 struct btrfs_block_rsv empty_block_rsv
;
910 /* list of block reservations that cross multiple transactions */
911 struct list_head durable_block_rsv_list
;
913 struct mutex durable_block_rsv_mutex
;
916 u64 last_trans_committed
;
919 * this is updated to the current trans every time a full commit
920 * is required instead of the faster short fsync log commits
922 u64 last_trans_log_full_commit
;
923 u64 open_ioctl_trans
;
924 unsigned long mount_opt
:20;
925 unsigned long compress_type
:4;
928 struct btrfs_transaction
*running_transaction
;
929 wait_queue_head_t transaction_throttle
;
930 wait_queue_head_t transaction_wait
;
931 wait_queue_head_t transaction_blocked_wait
;
932 wait_queue_head_t async_submit_wait
;
934 struct btrfs_super_block super_copy
;
935 struct btrfs_super_block super_for_commit
;
936 struct block_device
*__bdev
;
937 struct super_block
*sb
;
938 struct inode
*btree_inode
;
939 struct backing_dev_info bdi
;
940 struct mutex trans_mutex
;
941 struct mutex tree_log_mutex
;
942 struct mutex transaction_kthread_mutex
;
943 struct mutex cleaner_mutex
;
944 struct mutex chunk_mutex
;
945 struct mutex volume_mutex
;
947 * this protects the ordered operations list only while we are
948 * processing all of the entries on it. This way we make
949 * sure the commit code doesn't find the list temporarily empty
950 * because another function happens to be doing non-waiting preflush
951 * before jumping into the main commit.
953 struct mutex ordered_operations_mutex
;
954 struct rw_semaphore extent_commit_sem
;
956 struct rw_semaphore cleanup_work_sem
;
958 struct rw_semaphore subvol_sem
;
959 struct srcu_struct subvol_srcu
;
961 struct list_head trans_list
;
962 struct list_head hashers
;
963 struct list_head dead_roots
;
964 struct list_head caching_block_groups
;
966 spinlock_t delayed_iput_lock
;
967 struct list_head delayed_iputs
;
969 atomic_t nr_async_submits
;
970 atomic_t async_submit_draining
;
971 atomic_t nr_async_bios
;
972 atomic_t async_delalloc_pages
;
975 * this is used by the balancing code to wait for all the pending
978 spinlock_t ordered_extent_lock
;
981 * all of the data=ordered extents pending writeback
982 * these can span multiple transactions and basically include
983 * every dirty data page that isn't from nodatacow
985 struct list_head ordered_extents
;
988 * all of the inodes that have delalloc bytes. It is possible for
989 * this list to be empty even when there is still dirty data=ordered
990 * extents waiting to finish IO.
992 struct list_head delalloc_inodes
;
995 * special rename and truncate targets that must be on disk before
996 * we're allowed to commit. This is basically the ext3 style
999 struct list_head ordered_operations
;
1002 * there is a pool of worker threads for checksumming during writes
1003 * and a pool for checksumming after reads. This is because readers
1004 * can run with FS locks held, and the writers may be waiting for
1005 * those locks. We don't want ordering in the pending list to cause
1006 * deadlocks, and so the two are serviced separately.
1008 * A third pool does submit_bio to avoid deadlocking with the other
1011 struct btrfs_workers generic_worker
;
1012 struct btrfs_workers workers
;
1013 struct btrfs_workers delalloc_workers
;
1014 struct btrfs_workers endio_workers
;
1015 struct btrfs_workers endio_meta_workers
;
1016 struct btrfs_workers endio_meta_write_workers
;
1017 struct btrfs_workers endio_write_workers
;
1018 struct btrfs_workers endio_freespace_worker
;
1019 struct btrfs_workers submit_workers
;
1021 * fixup workers take dirty pages that didn't properly go through
1022 * the cow mechanism and make them safe to write. It happens
1023 * for the sys_munmap function call path
1025 struct btrfs_workers fixup_workers
;
1026 struct task_struct
*transaction_kthread
;
1027 struct task_struct
*cleaner_kthread
;
1028 int thread_pool_size
;
1030 struct kobject super_kobj
;
1031 struct completion kobj_unregister
;
1034 int log_root_recovering
;
1039 /* protected by the delalloc lock, used to keep from writing
1040 * metadata until there is a nice batch
1042 u64 dirty_metadata_bytes
;
1043 struct list_head dirty_cowonly_roots
;
1045 struct btrfs_fs_devices
*fs_devices
;
1048 * the space_info list is almost entirely read only. It only changes
1049 * when we add a new raid type to the FS, and that happens
1050 * very rarely. RCU is used to protect it.
1052 struct list_head space_info
;
1054 struct reloc_control
*reloc_ctl
;
1056 spinlock_t delalloc_lock
;
1057 spinlock_t new_trans_lock
;
1060 /* data_alloc_cluster is only used in ssd mode */
1061 struct btrfs_free_cluster data_alloc_cluster
;
1063 /* all metadata allocations go through this cluster */
1064 struct btrfs_free_cluster meta_alloc_cluster
;
1066 spinlock_t ref_cache_lock
;
1067 u64 total_ref_cache_size
;
1069 u64 avail_data_alloc_bits
;
1070 u64 avail_metadata_alloc_bits
;
1071 u64 avail_system_alloc_bits
;
1072 u64 data_alloc_profile
;
1073 u64 metadata_alloc_profile
;
1074 u64 system_alloc_profile
;
1076 unsigned data_chunk_allocations
;
1077 unsigned metadata_ratio
;
1081 /* filesystem state */
1086 * in ram representation of the tree. extent_root is used for all allocations
1087 * and for the extent tree extent_root root.
1090 struct extent_buffer
*node
;
1092 /* the node lock is held while changing the node pointer */
1093 spinlock_t node_lock
;
1095 struct extent_buffer
*commit_root
;
1096 struct btrfs_root
*log_root
;
1097 struct btrfs_root
*reloc_root
;
1099 struct btrfs_root_item root_item
;
1100 struct btrfs_key root_key
;
1101 struct btrfs_fs_info
*fs_info
;
1102 struct extent_io_tree dirty_log_pages
;
1104 struct kobject root_kobj
;
1105 struct completion kobj_unregister
;
1106 struct mutex objectid_mutex
;
1108 spinlock_t accounting_lock
;
1109 struct btrfs_block_rsv
*block_rsv
;
1111 /* free ino cache stuff */
1112 struct mutex fs_commit_mutex
;
1113 struct btrfs_free_space_ctl
*free_ino_ctl
;
1114 enum btrfs_caching_type cached
;
1115 spinlock_t cache_lock
;
1116 wait_queue_head_t cache_wait
;
1117 struct btrfs_free_space_ctl
*free_ino_pinned
;
1119 struct inode
*cache_inode
;
1121 struct mutex log_mutex
;
1122 wait_queue_head_t log_writer_wait
;
1123 wait_queue_head_t log_commit_wait
[2];
1124 atomic_t log_writers
;
1125 atomic_t log_commit
[2];
1126 unsigned long log_transid
;
1127 unsigned long last_log_commit
;
1128 unsigned long log_batch
;
1129 pid_t log_start_pid
;
1130 bool log_multiple_pids
;
1135 /* data allocations are done in sectorsize units */
1138 /* node allocations are done in nodesize units */
1141 /* leaf allocations are done in leafsize units */
1148 u64 highest_objectid
;
1153 u64 defrag_trans_start
;
1154 struct btrfs_key defrag_progress
;
1155 struct btrfs_key defrag_max
;
1160 /* the dirty list is only used by non-reference counted roots */
1161 struct list_head dirty_list
;
1163 struct list_head root_list
;
1165 spinlock_t orphan_lock
;
1166 struct list_head orphan_list
;
1167 struct btrfs_block_rsv
*orphan_block_rsv
;
1168 int orphan_item_inserted
;
1169 int orphan_cleanup_state
;
1171 spinlock_t inode_lock
;
1172 /* red-black tree that keeps track of in-memory inodes */
1173 struct rb_root inode_tree
;
1176 * right now this just gets used so that a root has its own devid
1177 * for stat. It may be used for more later
1179 struct super_block anon_super
;
1183 * inode items have the data typically returned from stat and store other
1184 * info about object characteristics. There is one for every file and dir in
1187 #define BTRFS_INODE_ITEM_KEY 1
1188 #define BTRFS_INODE_REF_KEY 12
1189 #define BTRFS_XATTR_ITEM_KEY 24
1190 #define BTRFS_ORPHAN_ITEM_KEY 48
1191 /* reserve 2-15 close to the inode for later flexibility */
1194 * dir items are the name -> inode pointers in a directory. There is one
1195 * for every name in a directory.
1197 #define BTRFS_DIR_LOG_ITEM_KEY 60
1198 #define BTRFS_DIR_LOG_INDEX_KEY 72
1199 #define BTRFS_DIR_ITEM_KEY 84
1200 #define BTRFS_DIR_INDEX_KEY 96
1202 * extent data is for file data
1204 #define BTRFS_EXTENT_DATA_KEY 108
1207 * extent csums are stored in a separate tree and hold csums for
1208 * an entire extent on disk.
1210 #define BTRFS_EXTENT_CSUM_KEY 128
1213 * root items point to tree roots. They are typically in the root
1214 * tree used by the super block to find all the other trees
1216 #define BTRFS_ROOT_ITEM_KEY 132
1219 * root backrefs tie subvols and snapshots to the directory entries that
1222 #define BTRFS_ROOT_BACKREF_KEY 144
1225 * root refs make a fast index for listing all of the snapshots and
1226 * subvolumes referenced by a given root. They point directly to the
1227 * directory item in the root that references the subvol
1229 #define BTRFS_ROOT_REF_KEY 156
1232 * extent items are in the extent map tree. These record which blocks
1233 * are used, and how many references there are to each block
1235 #define BTRFS_EXTENT_ITEM_KEY 168
1237 #define BTRFS_TREE_BLOCK_REF_KEY 176
1239 #define BTRFS_EXTENT_DATA_REF_KEY 178
1241 #define BTRFS_EXTENT_REF_V0_KEY 180
1243 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1245 #define BTRFS_SHARED_DATA_REF_KEY 184
1248 * block groups give us hints into the extent allocation trees. Which
1249 * blocks are free etc etc
1251 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1253 #define BTRFS_DEV_EXTENT_KEY 204
1254 #define BTRFS_DEV_ITEM_KEY 216
1255 #define BTRFS_CHUNK_ITEM_KEY 228
1258 * string items are for debugging. They just store a short string of
1261 #define BTRFS_STRING_ITEM_KEY 253
1263 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1264 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1265 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1266 #define BTRFS_MOUNT_SSD (1 << 3)
1267 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1268 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1269 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1270 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1271 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1272 #define BTRFS_MOUNT_NOSSD (1 << 9)
1273 #define BTRFS_MOUNT_DISCARD (1 << 10)
1274 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1275 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1276 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1277 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1278 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1280 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1281 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1282 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1287 #define BTRFS_INODE_NODATASUM (1 << 0)
1288 #define BTRFS_INODE_NODATACOW (1 << 1)
1289 #define BTRFS_INODE_READONLY (1 << 2)
1290 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1291 #define BTRFS_INODE_PREALLOC (1 << 4)
1292 #define BTRFS_INODE_SYNC (1 << 5)
1293 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1294 #define BTRFS_INODE_APPEND (1 << 7)
1295 #define BTRFS_INODE_NODUMP (1 << 8)
1296 #define BTRFS_INODE_NOATIME (1 << 9)
1297 #define BTRFS_INODE_DIRSYNC (1 << 10)
1298 #define BTRFS_INODE_COMPRESS (1 << 11)
1300 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1302 /* some macros to generate set/get funcs for the struct fields. This
1303 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1306 #define le8_to_cpu(v) (v)
1307 #define cpu_to_le8(v) (v)
1310 #define read_eb_member(eb, ptr, type, member, result) ( \
1311 read_extent_buffer(eb, (char *)(result), \
1312 ((unsigned long)(ptr)) + \
1313 offsetof(type, member), \
1314 sizeof(((type *)0)->member)))
1316 #define write_eb_member(eb, ptr, type, member, result) ( \
1317 write_extent_buffer(eb, (char *)(result), \
1318 ((unsigned long)(ptr)) + \
1319 offsetof(type, member), \
1320 sizeof(((type *)0)->member)))
1322 #ifndef BTRFS_SETGET_FUNCS
1323 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1324 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1325 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1328 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1329 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1331 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1332 u##bits res = le##bits##_to_cpu(p->member); \
1333 kunmap_atomic(p, KM_USER0); \
1336 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1339 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1340 p->member = cpu_to_le##bits(val); \
1341 kunmap_atomic(p, KM_USER0); \
1344 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1345 static inline u##bits btrfs_##name(type *s) \
1347 return le##bits##_to_cpu(s->member); \
1349 static inline void btrfs_set_##name(type *s, u##bits val) \
1351 s->member = cpu_to_le##bits(val); \
1354 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1355 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1356 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1357 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1358 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1359 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1361 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1362 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1363 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1364 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1365 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1366 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1368 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1369 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1371 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1373 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1375 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1377 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1379 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1380 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1382 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1384 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1386 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1389 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1391 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1394 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1396 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1399 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1400 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1401 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1402 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1403 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1404 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1405 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1406 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1407 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1408 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1409 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1411 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1413 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1416 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1417 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1418 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1420 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1422 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1424 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1426 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1427 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1429 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1431 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1432 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1434 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1437 unsigned long offset
= (unsigned long)c
;
1438 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1439 offset
+= nr
* sizeof(struct btrfs_stripe
);
1440 return (struct btrfs_stripe
*)offset
;
1443 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1445 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1448 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1449 struct btrfs_chunk
*c
, int nr
)
1451 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1454 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1455 struct btrfs_chunk
*c
, int nr
,
1458 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1461 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1462 struct btrfs_chunk
*c
, int nr
)
1464 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1467 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1468 struct btrfs_chunk
*c
, int nr
,
1471 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1474 /* struct btrfs_block_group_item */
1475 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1477 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1479 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1480 struct btrfs_block_group_item
, chunk_objectid
, 64);
1482 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1483 struct btrfs_block_group_item
, chunk_objectid
, 64);
1484 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1485 struct btrfs_block_group_item
, flags
, 64);
1486 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1487 struct btrfs_block_group_item
, flags
, 64);
1489 /* struct btrfs_inode_ref */
1490 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1491 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1493 /* struct btrfs_inode_item */
1494 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1495 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1496 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1497 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1498 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1499 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1500 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1501 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1502 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1503 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1504 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1505 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1507 static inline struct btrfs_timespec
*
1508 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1510 unsigned long ptr
= (unsigned long)inode_item
;
1511 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1512 return (struct btrfs_timespec
*)ptr
;
1515 static inline struct btrfs_timespec
*
1516 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1518 unsigned long ptr
= (unsigned long)inode_item
;
1519 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1520 return (struct btrfs_timespec
*)ptr
;
1523 static inline struct btrfs_timespec
*
1524 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1526 unsigned long ptr
= (unsigned long)inode_item
;
1527 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1528 return (struct btrfs_timespec
*)ptr
;
1531 static inline struct btrfs_timespec
*
1532 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1534 unsigned long ptr
= (unsigned long)inode_item
;
1535 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1536 return (struct btrfs_timespec
*)ptr
;
1539 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1540 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1542 /* struct btrfs_dev_extent */
1543 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1545 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1546 chunk_objectid
, 64);
1547 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1549 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1551 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1553 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1554 return (u8
*)((unsigned long)dev
+ ptr
);
1557 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1558 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1560 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1562 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1565 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1567 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1568 struct btrfs_tree_block_info
*item
,
1569 struct btrfs_disk_key
*key
)
1571 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1574 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1575 struct btrfs_tree_block_info
*item
,
1576 struct btrfs_disk_key
*key
)
1578 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1581 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1583 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1585 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1587 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1590 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1593 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1595 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1598 static inline u32
btrfs_extent_inline_ref_size(int type
)
1600 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1601 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1602 return sizeof(struct btrfs_extent_inline_ref
);
1603 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1604 return sizeof(struct btrfs_shared_data_ref
) +
1605 sizeof(struct btrfs_extent_inline_ref
);
1606 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1607 return sizeof(struct btrfs_extent_data_ref
) +
1608 offsetof(struct btrfs_extent_inline_ref
, offset
);
1613 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1614 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1616 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1617 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1619 /* struct btrfs_node */
1620 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1621 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1623 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1626 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1627 sizeof(struct btrfs_key_ptr
) * nr
;
1628 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1631 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1635 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1636 sizeof(struct btrfs_key_ptr
) * nr
;
1637 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1640 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1643 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1644 sizeof(struct btrfs_key_ptr
) * nr
;
1645 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1648 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1652 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1653 sizeof(struct btrfs_key_ptr
) * nr
;
1654 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1657 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1659 return offsetof(struct btrfs_node
, ptrs
) +
1660 sizeof(struct btrfs_key_ptr
) * nr
;
1663 void btrfs_node_key(struct extent_buffer
*eb
,
1664 struct btrfs_disk_key
*disk_key
, int nr
);
1666 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1667 struct btrfs_disk_key
*disk_key
, int nr
)
1670 ptr
= btrfs_node_key_ptr_offset(nr
);
1671 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1672 struct btrfs_key_ptr
, key
, disk_key
);
1675 /* struct btrfs_item */
1676 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1677 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1679 static inline unsigned long btrfs_item_nr_offset(int nr
)
1681 return offsetof(struct btrfs_leaf
, items
) +
1682 sizeof(struct btrfs_item
) * nr
;
1685 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1688 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1691 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1692 struct btrfs_item
*item
)
1694 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1697 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1699 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1702 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1704 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1707 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1709 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1712 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1713 struct btrfs_disk_key
*disk_key
, int nr
)
1715 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1716 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1719 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1720 struct btrfs_disk_key
*disk_key
, int nr
)
1722 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1723 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1726 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1729 * struct btrfs_root_ref
1731 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1732 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1733 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1735 /* struct btrfs_dir_item */
1736 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1737 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1738 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1739 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1741 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1742 struct btrfs_dir_item
*item
,
1743 struct btrfs_disk_key
*key
)
1745 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1748 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1749 struct btrfs_dir_item
*item
,
1750 struct btrfs_disk_key
*key
)
1752 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1755 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1757 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1759 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1762 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1763 struct btrfs_free_space_header
*h
,
1764 struct btrfs_disk_key
*key
)
1766 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1769 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1770 struct btrfs_free_space_header
*h
,
1771 struct btrfs_disk_key
*key
)
1773 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1776 /* struct btrfs_disk_key */
1777 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1779 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1780 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1782 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1783 struct btrfs_disk_key
*disk
)
1785 cpu
->offset
= le64_to_cpu(disk
->offset
);
1786 cpu
->type
= disk
->type
;
1787 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1790 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1791 struct btrfs_key
*cpu
)
1793 disk
->offset
= cpu_to_le64(cpu
->offset
);
1794 disk
->type
= cpu
->type
;
1795 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1798 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1799 struct btrfs_key
*key
, int nr
)
1801 struct btrfs_disk_key disk_key
;
1802 btrfs_node_key(eb
, &disk_key
, nr
);
1803 btrfs_disk_key_to_cpu(key
, &disk_key
);
1806 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1807 struct btrfs_key
*key
, int nr
)
1809 struct btrfs_disk_key disk_key
;
1810 btrfs_item_key(eb
, &disk_key
, nr
);
1811 btrfs_disk_key_to_cpu(key
, &disk_key
);
1814 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1815 struct btrfs_dir_item
*item
,
1816 struct btrfs_key
*key
)
1818 struct btrfs_disk_key disk_key
;
1819 btrfs_dir_item_key(eb
, item
, &disk_key
);
1820 btrfs_disk_key_to_cpu(key
, &disk_key
);
1824 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1829 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1834 /* struct btrfs_header */
1835 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1836 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1838 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1839 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1840 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1841 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1843 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1845 return (btrfs_header_flags(eb
) & flag
) == flag
;
1848 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1850 u64 flags
= btrfs_header_flags(eb
);
1851 btrfs_set_header_flags(eb
, flags
| flag
);
1852 return (flags
& flag
) == flag
;
1855 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1857 u64 flags
= btrfs_header_flags(eb
);
1858 btrfs_set_header_flags(eb
, flags
& ~flag
);
1859 return (flags
& flag
) == flag
;
1862 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1864 u64 flags
= btrfs_header_flags(eb
);
1865 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1868 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1871 u64 flags
= btrfs_header_flags(eb
);
1872 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1873 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1874 btrfs_set_header_flags(eb
, flags
);
1877 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1879 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1883 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1885 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1889 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1891 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1895 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1897 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1901 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1906 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1911 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1916 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1918 return btrfs_header_level(eb
) == 0;
1921 /* struct btrfs_root_item */
1922 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1924 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1925 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1926 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1928 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1930 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1931 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1932 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1933 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1934 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1935 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1936 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1937 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1940 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
1942 return root
->root_item
.flags
& BTRFS_ROOT_SUBVOL_RDONLY
;
1945 /* struct btrfs_super_block */
1947 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1948 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1949 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1951 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1952 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1953 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1954 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1955 struct btrfs_super_block
, chunk_root_generation
, 64);
1956 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1958 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1960 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1961 chunk_root_level
, 8);
1962 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1964 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1965 log_root_transid
, 64);
1966 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1968 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1970 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1972 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1974 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1976 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1978 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1980 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1981 root_dir_objectid
, 64);
1982 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1984 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1986 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1987 compat_ro_flags
, 64);
1988 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1989 incompat_flags
, 64);
1990 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1992 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
1993 cache_generation
, 64);
1995 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1997 int t
= btrfs_super_csum_type(s
);
1998 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1999 return btrfs_csum_sizes
[t
];
2002 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2004 return offsetof(struct btrfs_leaf
, items
);
2007 /* struct btrfs_file_extent_item */
2008 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2010 static inline unsigned long
2011 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2013 unsigned long offset
= (unsigned long)e
;
2014 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2018 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2020 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2023 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2025 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2027 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2028 disk_num_bytes
, 64);
2029 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2031 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2033 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2035 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2037 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2039 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2040 other_encoding
, 16);
2042 /* this returns the number of file bytes represented by the inline item.
2043 * If an item is compressed, this is the uncompressed size
2045 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2046 struct btrfs_file_extent_item
*e
)
2048 return btrfs_file_extent_ram_bytes(eb
, e
);
2052 * this returns the number of bytes used by the item on disk, minus the
2053 * size of any extent headers. If a file is compressed on disk, this is
2054 * the compressed size
2056 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2057 struct btrfs_item
*e
)
2059 unsigned long offset
;
2060 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2061 return btrfs_item_size(eb
, e
) - offset
;
2064 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
2066 return sb
->s_fs_info
;
2069 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
2070 const char *name
, int len
)
2072 /* if we already have a name just free it */
2075 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
2079 memcpy(root
->name
, name
, len
);
2080 root
->name
[len
] = '\0';
2085 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2088 return root
->leafsize
;
2089 return root
->nodesize
;
2092 /* helper function to cast into the data area of the leaf. */
2093 #define btrfs_item_ptr(leaf, slot, type) \
2094 ((type *)(btrfs_leaf_data(leaf) + \
2095 btrfs_item_offset_nr(leaf, slot)))
2097 #define btrfs_item_ptr_offset(leaf, slot) \
2098 ((unsigned long)(btrfs_leaf_data(leaf) + \
2099 btrfs_item_offset_nr(leaf, slot)))
2101 static inline struct dentry
*fdentry(struct file
*file
)
2103 return file
->f_path
.dentry
;
2106 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2108 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2109 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2113 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2114 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2115 struct btrfs_root
*root
, unsigned long count
);
2116 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2117 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2118 struct btrfs_root
*root
, u64 bytenr
,
2119 u64 num_bytes
, u64
*refs
, u64
*flags
);
2120 int btrfs_pin_extent(struct btrfs_root
*root
,
2121 u64 bytenr
, u64 num
, int reserved
);
2122 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
2123 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2124 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2125 struct btrfs_root
*root
,
2126 u64 objectid
, u64 offset
, u64 bytenr
);
2127 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
2128 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2129 struct btrfs_fs_info
*info
,
2131 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2132 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2133 u64 search_start
, u64 search_hint
, int owner
);
2134 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2135 struct btrfs_root
*root
, u32 blocksize
,
2136 u64 parent
, u64 root_objectid
,
2137 struct btrfs_disk_key
*key
, int level
,
2138 u64 hint
, u64 empty_size
);
2139 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2140 struct btrfs_root
*root
,
2141 struct extent_buffer
*buf
,
2142 u64 parent
, int last_ref
);
2143 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2144 struct btrfs_root
*root
,
2145 u64 bytenr
, u32 blocksize
,
2147 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2148 struct btrfs_root
*root
,
2149 u64 root_objectid
, u64 owner
,
2150 u64 offset
, struct btrfs_key
*ins
);
2151 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2152 struct btrfs_root
*root
,
2153 u64 root_objectid
, u64 owner
, u64 offset
,
2154 struct btrfs_key
*ins
);
2155 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2156 struct btrfs_root
*root
,
2157 u64 num_bytes
, u64 min_alloc_size
,
2158 u64 empty_size
, u64 hint_byte
,
2159 u64 search_end
, struct btrfs_key
*ins
,
2161 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2162 struct extent_buffer
*buf
, int full_backref
);
2163 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2164 struct extent_buffer
*buf
, int full_backref
);
2165 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2166 struct btrfs_root
*root
,
2167 u64 bytenr
, u64 num_bytes
, u64 flags
,
2169 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2170 struct btrfs_root
*root
,
2171 u64 bytenr
, u64 num_bytes
, u64 parent
,
2172 u64 root_objectid
, u64 owner
, u64 offset
);
2174 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2175 int btrfs_update_reserved_bytes(struct btrfs_block_group_cache
*cache
,
2176 u64 num_bytes
, int reserve
, int sinfo
);
2177 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2178 struct btrfs_root
*root
);
2179 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2180 struct btrfs_root
*root
);
2181 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2182 struct btrfs_root
*root
,
2183 u64 bytenr
, u64 num_bytes
, u64 parent
,
2184 u64 root_objectid
, u64 owner
, u64 offset
);
2186 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2187 struct btrfs_root
*root
);
2188 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2189 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2190 int btrfs_read_block_groups(struct btrfs_root
*root
);
2191 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2192 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2193 struct btrfs_root
*root
, u64 bytes_used
,
2194 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2196 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2197 struct btrfs_root
*root
, u64 group_start
);
2198 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2199 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2200 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2201 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2202 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2203 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2204 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle
*trans
,
2205 struct btrfs_root
*root
,
2207 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2208 struct btrfs_root
*root
);
2209 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2210 struct inode
*inode
);
2211 void btrfs_orphan_release_metadata(struct inode
*inode
);
2212 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2213 struct btrfs_pending_snapshot
*pending
);
2214 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2215 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2216 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2217 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2218 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2219 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2220 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2221 struct btrfs_block_rsv
*rsv
);
2222 void btrfs_add_durable_block_rsv(struct btrfs_fs_info
*fs_info
,
2223 struct btrfs_block_rsv
*rsv
);
2224 int btrfs_block_rsv_add(struct btrfs_trans_handle
*trans
,
2225 struct btrfs_root
*root
,
2226 struct btrfs_block_rsv
*block_rsv
,
2228 int btrfs_block_rsv_check(struct btrfs_trans_handle
*trans
,
2229 struct btrfs_root
*root
,
2230 struct btrfs_block_rsv
*block_rsv
,
2231 u64 min_reserved
, int min_factor
);
2232 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2233 struct btrfs_block_rsv
*dst_rsv
,
2235 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2236 struct btrfs_block_rsv
*block_rsv
,
2238 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2239 struct btrfs_block_group_cache
*cache
);
2240 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2241 struct btrfs_block_group_cache
*cache
);
2242 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2243 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2244 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2245 u64 start
, u64 end
);
2246 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2247 u64 num_bytes
, u64
*actual_bytes
);
2248 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2249 struct btrfs_root
*root
, u64 type
);
2250 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2252 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2254 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2255 int level
, int *slot
);
2256 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2257 int btrfs_previous_item(struct btrfs_root
*root
,
2258 struct btrfs_path
*path
, u64 min_objectid
,
2260 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2261 struct btrfs_root
*root
, struct btrfs_path
*path
,
2262 struct btrfs_key
*new_key
);
2263 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2264 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2265 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2266 struct btrfs_key
*key
, int lowest_level
,
2267 int cache_only
, u64 min_trans
);
2268 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2269 struct btrfs_key
*max_key
,
2270 struct btrfs_path
*path
, int cache_only
,
2272 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2273 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2274 struct extent_buffer
*parent
, int parent_slot
,
2275 struct extent_buffer
**cow_ret
);
2276 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2277 struct btrfs_root
*root
,
2278 struct extent_buffer
*buf
,
2279 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2280 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2281 struct extent_buffer
*buf
);
2282 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2283 *root
, struct btrfs_path
*path
, u32 data_size
);
2284 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2285 struct btrfs_root
*root
,
2286 struct btrfs_path
*path
,
2287 u32 new_size
, int from_end
);
2288 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2289 struct btrfs_root
*root
,
2290 struct btrfs_path
*path
,
2291 struct btrfs_key
*new_key
,
2292 unsigned long split_offset
);
2293 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2294 struct btrfs_root
*root
,
2295 struct btrfs_path
*path
,
2296 struct btrfs_key
*new_key
);
2297 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2298 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2300 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2301 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2302 int start_slot
, int cache_only
, u64
*last_ret
,
2303 struct btrfs_key
*progress
);
2304 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2305 struct btrfs_path
*btrfs_alloc_path(void);
2306 void btrfs_free_path(struct btrfs_path
*p
);
2307 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2308 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2310 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2311 struct btrfs_path
*path
, int slot
, int nr
);
2312 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2313 struct btrfs_root
*root
,
2314 struct btrfs_path
*path
)
2316 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2319 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2320 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2321 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
2322 struct btrfs_root
*root
,
2323 struct btrfs_path
*path
,
2324 struct btrfs_key
*cpu_key
, u32
*data_size
,
2326 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2327 struct btrfs_root
*root
,
2328 struct btrfs_path
*path
,
2329 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2331 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2332 struct btrfs_root
*root
,
2333 struct btrfs_path
*path
,
2334 struct btrfs_key
*key
,
2337 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2340 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2341 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2342 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2343 int btrfs_drop_snapshot(struct btrfs_root
*root
,
2344 struct btrfs_block_rsv
*block_rsv
, int update_ref
);
2345 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2346 struct btrfs_root
*root
,
2347 struct extent_buffer
*node
,
2348 struct extent_buffer
*parent
);
2350 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2351 struct btrfs_path
*path
,
2352 u64 root_id
, u64 ref_id
);
2353 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2354 struct btrfs_root
*tree_root
,
2355 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2356 const char *name
, int name_len
);
2357 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2358 struct btrfs_root
*tree_root
,
2359 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2360 const char *name
, int name_len
);
2361 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2362 struct btrfs_key
*key
);
2363 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2364 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2366 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2367 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2369 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2370 btrfs_root_item
*item
, struct btrfs_key
*key
);
2371 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2372 u64
*found_objectid
);
2373 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2374 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2375 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2376 struct extent_buffer
*node
);
2377 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2380 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2381 struct btrfs_root
*root
, const char *name
,
2382 int name_len
, u64 dir
,
2383 struct btrfs_key
*location
, u8 type
, u64 index
);
2384 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2385 struct btrfs_root
*root
,
2386 struct btrfs_path
*path
, u64 dir
,
2387 const char *name
, int name_len
,
2389 struct btrfs_dir_item
*
2390 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2391 struct btrfs_root
*root
,
2392 struct btrfs_path
*path
, u64 dir
,
2393 u64 objectid
, const char *name
, int name_len
,
2395 struct btrfs_dir_item
*
2396 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2397 struct btrfs_path
*path
, u64 dirid
,
2398 const char *name
, int name_len
);
2399 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2400 struct btrfs_path
*path
,
2401 const char *name
, int name_len
);
2402 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2403 struct btrfs_root
*root
,
2404 struct btrfs_path
*path
,
2405 struct btrfs_dir_item
*di
);
2406 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2407 struct btrfs_root
*root
,
2408 struct btrfs_path
*path
, u64 objectid
,
2409 const char *name
, u16 name_len
,
2410 const void *data
, u16 data_len
);
2411 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2412 struct btrfs_root
*root
,
2413 struct btrfs_path
*path
, u64 dir
,
2414 const char *name
, u16 name_len
,
2416 int verify_dir_item(struct btrfs_root
*root
,
2417 struct extent_buffer
*leaf
,
2418 struct btrfs_dir_item
*dir_item
);
2421 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2422 struct btrfs_root
*root
, u64 offset
);
2423 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2424 struct btrfs_root
*root
, u64 offset
);
2425 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2428 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2429 struct btrfs_root
*root
,
2430 const char *name
, int name_len
,
2431 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2432 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2433 struct btrfs_root
*root
,
2434 const char *name
, int name_len
,
2435 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2436 struct btrfs_inode_ref
*
2437 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2438 struct btrfs_root
*root
,
2439 struct btrfs_path
*path
,
2440 const char *name
, int name_len
,
2441 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2442 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2443 struct btrfs_root
*root
,
2444 struct btrfs_path
*path
, u64 objectid
);
2445 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2446 *root
, struct btrfs_path
*path
,
2447 struct btrfs_key
*location
, int mod
);
2450 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2451 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2452 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2453 struct bio
*bio
, u32
*dst
);
2454 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2455 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2456 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2457 struct btrfs_root
*root
,
2458 u64 objectid
, u64 pos
,
2459 u64 disk_offset
, u64 disk_num_bytes
,
2460 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2461 u8 compression
, u8 encryption
, u16 other_encoding
);
2462 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2463 struct btrfs_root
*root
,
2464 struct btrfs_path
*path
, u64 objectid
,
2465 u64 bytenr
, int mod
);
2466 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2467 struct btrfs_root
*root
,
2468 struct btrfs_ordered_sum
*sums
);
2469 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2470 struct bio
*bio
, u64 file_start
, int contig
);
2471 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2472 u64 start
, unsigned long len
);
2473 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2474 struct btrfs_root
*root
,
2475 struct btrfs_path
*path
,
2476 u64 bytenr
, int cow
);
2477 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2478 struct btrfs_root
*root
, struct btrfs_path
*path
,
2480 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2481 u64 end
, struct list_head
*list
);
2484 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2485 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2486 #define ClearPageChecked ClearPageFsMisc
2487 #define SetPageChecked SetPageFsMisc
2488 #define PageChecked PageFsMisc
2491 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2492 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2493 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2494 struct btrfs_root
*root
,
2495 struct inode
*dir
, struct inode
*inode
,
2496 const char *name
, int name_len
);
2497 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2498 struct inode
*parent_inode
, struct inode
*inode
,
2499 const char *name
, int name_len
, int add_backref
, u64 index
);
2500 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2501 struct btrfs_root
*root
,
2502 struct inode
*dir
, u64 objectid
,
2503 const char *name
, int name_len
);
2504 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2505 struct btrfs_root
*root
,
2506 struct inode
*inode
, u64 new_size
,
2509 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2510 int btrfs_start_one_delalloc_inode(struct btrfs_root
*root
, int delay_iput
,
2512 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2513 struct extent_state
**cached_state
);
2514 int btrfs_writepages(struct address_space
*mapping
,
2515 struct writeback_control
*wbc
);
2516 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2517 struct btrfs_root
*new_root
,
2518 u64 new_dirid
, u64 alloc_hint
);
2519 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2520 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2522 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2523 struct file_ra_state
*ra
, struct file
*file
,
2524 pgoff_t offset
, pgoff_t last_index
);
2525 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2526 int btrfs_readpage(struct file
*file
, struct page
*page
);
2527 void btrfs_evict_inode(struct inode
*inode
);
2528 void btrfs_put_inode(struct inode
*inode
);
2529 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2530 void btrfs_dirty_inode(struct inode
*inode
);
2531 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2532 void btrfs_destroy_inode(struct inode
*inode
);
2533 int btrfs_drop_inode(struct inode
*inode
);
2534 int btrfs_init_cachep(void);
2535 void btrfs_destroy_cachep(void);
2536 long btrfs_ioctl_trans_end(struct file
*file
);
2537 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2538 struct btrfs_root
*root
, int *was_new
);
2539 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2540 unsigned from
, unsigned to
);
2541 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2542 size_t page_offset
, u64 start
, u64 end
,
2544 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2545 struct btrfs_root
*root
,
2546 struct inode
*inode
);
2547 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2548 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2549 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
2550 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle
*trans
,
2551 struct btrfs_pending_snapshot
*pending
,
2552 u64
*bytes_to_reserve
);
2553 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle
*trans
,
2554 struct btrfs_pending_snapshot
*pending
);
2555 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2556 struct btrfs_root
*root
);
2557 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
2558 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2559 void btrfs_add_delayed_iput(struct inode
*inode
);
2560 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2561 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2562 u64 start
, u64 num_bytes
, u64 min_size
,
2563 loff_t actual_len
, u64
*alloc_hint
);
2564 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2565 struct btrfs_trans_handle
*trans
, int mode
,
2566 u64 start
, u64 num_bytes
, u64 min_size
,
2567 loff_t actual_len
, u64
*alloc_hint
);
2568 extern const struct dentry_operations btrfs_dentry_operations
;
2571 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2572 void btrfs_update_iflags(struct inode
*inode
);
2573 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2576 int btrfs_sync_file(struct file
*file
, int datasync
);
2577 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2579 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2580 extern const struct file_operations btrfs_file_operations
;
2581 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2582 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2583 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2584 struct inode
*inode
, u64 start
, u64 end
);
2585 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2586 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
2587 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
2588 struct page
**pages
, size_t num_pages
,
2589 loff_t pos
, size_t write_bytes
,
2590 struct extent_state
**cached
);
2593 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2594 struct btrfs_root
*root
, int cache_only
);
2597 int btrfs_init_sysfs(void);
2598 void btrfs_exit_sysfs(void);
2599 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2600 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2601 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2602 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2605 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2608 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2609 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2610 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
2611 unsigned int line
, int errno
);
2613 #define btrfs_std_error(fs_info, errno) \
2616 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2620 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2621 int btrfs_check_acl(struct inode
*inode
, int mask
, unsigned int flags
);
2623 #define btrfs_check_acl NULL
2625 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2626 struct inode
*inode
, struct inode
*dir
);
2627 int btrfs_acl_chmod(struct inode
*inode
);
2630 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2631 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2632 struct btrfs_root
*root
);
2633 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2634 struct btrfs_root
*root
);
2635 int btrfs_recover_relocation(struct btrfs_root
*root
);
2636 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
2637 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
2638 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2639 struct extent_buffer
*cow
);
2640 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
2641 struct btrfs_pending_snapshot
*pending
,
2642 u64
*bytes_to_reserve
);
2643 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
2644 struct btrfs_pending_snapshot
*pending
);